Tephraderm, Hive Mind, Star of Extinction, and Gratuitous Violence

Prerequisites

• Tephraderm on the battlefield
• Hive Mind on the battlefield
• Star of Extinction in hand
• Gratuitous Violence on the battlefield
• undefined available

Steps

1. Give Tephraderm indestructible, if needed
2. Cast Star of Extinction by paying
3. Hive Mind triggers, causing each opponent to copy Star of Extinction
4. Resolve an opponent's Star of Extinction, destroying a land and dealing 20 damage to each creature and planeswalker
5. Tephraderm's second ability triggers, dealing 40 damage to the opponent who controlled the Star of Extinction copy due to Gratuitous Violence
6. Repeat from step 4 for each remaining Star of Extinction until each opponent loses the game

Results

• Near-infinite damage